    /* 整个滚动条 */
::-webkit-scrollbar {
    /* 对应纵向滚动条的宽度 */
    width: 1%;
    /* 对应横向滚动条的宽度 */
    height: 1px;
}
    
    /* 提示文本 */
        .tooltip {
            color: white;
            position: relative;
            display: inline-block;
            border-bottom: 1px dotted #26ff8e;
        }
        
        .tooltip .tooltiptext {
            visibility: hidden;
            width: 120px;
            background-color: black;
            color: #26ff8e;
            text-align: center;
            border-radius: 6px;
            padding: 5px 0;
            position: absolute;
            z-index: 1;
            top: 150%;
            left: 50%;
            margin-left: -60px;
        }
        
        .tooltip .tooltiptext::after {
            content: "";
            position: absolute;
            bottom: 100%;
            left: 50%;
            margin-left: -5px;
            border-width: 5px;
            border-style: solid;
            border-color: transparent transparent white transparent;
        }
        
        .tooltip:hover .tooltiptext {
            visibility: visible;
        }

        .about_title {
            font-size: 35px;
        }
        .about_title_2 {
            font-size: 22px;
            font-weight: bold;
        }
